<template>
  <div class="roles-container">
    <!-- 面包屑导航区域 -->
    <el-breadcrumb>
      <el-breadcrumb-item :to="{path:'/home'}">首页</el-breadcrumb-item>
      <el-breadcrumb-item>
        <a href="/">权限管理</a>
      </el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoleUser">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色里列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',index1===0? 'bdtop':'','vcenter']"
              v-for="(item1,index1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag type="danger">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级三级权限 -->
              <el-col :span="19">
                <el-row
                  v-for="(item2,index2) in item1.children"
                  :key="item2.id"
                  :class="[index2===0? '':'bdtop','vcenter']"
                >
                  <!-- 通过for循环 嵌套二级权限 -->
                  <el-col :span="6">
                    <el-tag type="success">{{item2.authName}}</el-tag>

                    <i class="el-icon-caret-right"></i>
                  </el-col>

                  <el-col :span="18">
                    <el-tag
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="delRigths(scope.row, item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色 -->
    <el-dialog title="添加用户" :visible.sync="roleDialogVisible" width="50%" @close="addDialogClosed">
      <el-form :model="rolesForm" :rules="rolesRules" ref="roleFormRef" label-width="100px">
        <el-form-item label="角色名" prop="roleName">
          <el-input v-model="rolesForm.roleName"></el-input>
        </el-form-item>

        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="rolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="roleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="roleUser">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //权限列表
      rolesList: [],
      addUser: false,
      rolesForm: {
        roleName: "",
        roleDesc: ""
      },
      defKeys: [],
       // 当前即将分配权限的角色id
      roleId: '',
      rolesRules: {
        roleName: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          {
            min: 2,
            max: 10,
            message: "用户名的长度在3~10个字符之间",
            trigger: "blur"
          }
        ],
        roleDesc: [
          { required: true, message: "请输入密码", trigger: "blur" },
          {
            min: 3,
            max: 15,
            message: "密码的长度在6~15个字符之间",
            trigger: "blur"
          }
        ]
      },
      setRightDialogVisible: false,
      roleDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      }
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //请求分类数据
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        this.$message.error(res.meta.msg);
        return false;
      }
      this.rolesList = res.data;
      console.log(this.rolesList);
    },
    //添加角色对话框关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
      console.log(this.$refs);
    },

    //增加角色
    addRoleUser() {
      this.roleDialogVisible = true;
    },
    roleUser() {
      this.$refs.roleFormRef.validate(async valid => {
        console.log(valid);

        if (!valid) return;

        const { data: res } = await this.$http.post("roles", this.rolesForm);

        if (res.meta.status !== 201) {
          this.$message.error("添加用户失败");
        }
        this.$message.success("添加角色成功");
        this.roleDialogVisible = false;
        //重新获取用户数据
        this.getRolesList();
      });
    },
    //删除权限操作
    // 根据Id删除对应的权限
    async delRigths(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);

      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除！");
      }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );

      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败！");
      }
      // this.getRolesList()
      role.children = res.data;
    },
  
 
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }

      // 把获取到的权限数据保存到 data 中
      this.rightslist = res.data
      console.log(this.rightslist)

      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys)
     
      
      this.setRightDialogVisible = true
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
    //递归代码
    // setDefaultCheckedKeys(info, arr) {
    //   if(!info.children) {
    //     return arr.push(info.id)
    //   }

    //   info.children.forEach((item)=> {
    //     this.setDefaultCheckedKeys(item, this.defaultCheckedKeys)
    //   })
    // }
  }
};
</script>
<style lang="less">
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>